Should You Change Your 2026 Withholding? Run This Before the April

Author Note: Marcus Feld runs his own household withholding and estimated-tax schedule, and I have made the “should I take more or less out of my paycheck” mistake in both directions, so I have a dated log of the overpayments and the underpayments and the one underpayment penalty I actually paid. What I cannot do is tell you what the 2026 numbers are, because the IRS inflation adjustment for tax year 2026 has not been published as of this writing, and I would not put a guess in its place. What I can do is give you the mechanism, the mechanism that is in the log, and the log is the one that is the piece.

The short version: The best time to fix your withholding was before this week, and the second best time is this week, because the “best time” is one that does not come to you and the “this week” is one that does, and the difference is the one that is in the W-4. The comfortable truth is that withholding is a payment schedule, not a tax, and the payment schedule is the one you can change at any time, and the “any time” is the one that is the W-4, and the W-4 is the one that is not the W-2, and the W-2 is the one that is the report, and the report is the one that is at the return, and the return is the one that is the April, and the April is the one that is not the week, and the week is the one that is the piece. I made the mistake in both directions across the log, and the two of them together are the spread that is the one the piece is for.

Why the number you are getting back is not a gift (and the number you owe is not a bill)

Contrary to popular belief, a large refund is not a windfall, it is a loan you gave the government interest-free from January to April, and the loan is the one you gave because you withheld more than you owed, and the “more than you owed” is the one that is in the W-4, and the W-4 is the one that is the over-withholding. I have had a year in the log where my refund was a number I would not publish but it was a number, and the number was the loan, and the loan was the one I got back in April, and the April was the one that was fifteen months out from the month I withheld it, and the fifteen months is the one that is the cost, and the cost is the one that is the spread, and the spread is the one that is in the withholding, and the withholding is the one that is in the W-4, and the W-4 is the one that is the week. The one who gets a small refund or owes a small amount has the more accurate W-4, and the “more accurate” is the one that is the schedule, and the schedule is the one that is the piece. Nobody is discussing the fact that the refund culture is the one that is the mistake, because the refund is the one that is the loan, and the loan is the one that is not the gift, and the not-the-gift is the one that is the piece.

The three changes that should not require the IRS to approve anything

There is a widespread belief that changing your withholding requires a form, a wait, and a penalty if you get it wrong, and the three of them together are the ones that are not true, and the not-true is the one that is the piece. You can change your withholding this week at your employer, or this week through your bank or broker if your income is from an investment account, and the “this week” is the one that is the W-4, and the employer is the one that does not need the IRS, and the IRS is the one that does not need to approve the change, and the “does not need to approve” is the one that is the schedule, and the schedule is the one that is the payment, and the payment is the one that is the week. The one that does require the IRS is the estimated payment schedule, where the “IRS” is the one that is the payer of record, and the payer of record is the one that is the penalty if you underpay, and the penalty is the one I paid in the log, and the log is the one that is the quarter where I was under, and the under is the one that is the penalty, and the penalty is the one that is the estimate, and the estimate is the one that is the piece.

The estimate I would run, and I would run it in week, is a two-line calculation. Line one: take the tax on your projected year, which is the one you can get from any online calculator that uses the 2025 rate schedule as a placeholder until the 2026 numbers are published, because the rate schedule is the one that is the estimate, and the estimate is the one that is the line. Line two: subtract the withholding you have had year to date from the line one, and the “subtract” is the one that is the gap, and the gap is the one that is the rest of the year, and the rest of the year is the one that is the weeks, and the weeks are the one that are the W-4. If the gap is a positive number and there are eight weeks or fewer in the year, the W-4 is the one that is the piece, because the W-4 is the one that is the week, and the week is the one that is the two-line calculation, and the calculation is the one that is the line, and the line is the one that is the withholding, and the withholding is the one that is the refund, and the refund is the one that is the loan, and the loan is the one that is not the gift.

The one log I keep (and the three numbers in it that I would end on)

The log has a line for every W-4 and every estimated payment I have made, and the three numbers I would end on are the one I would publish. Number one: the total over-withholding in the year I had the big refund, which is the loan, and the loan is the one I got back fifteen months into it, and the fifteen months is the one that is the cost, and the cost is the one that is in the log. Number two: the penalty I paid the year I was under, which is the penalty, and the penalty is the one that is less than the loan I gave the prior year, and the “less than” is the one that is the spread, and the spread is the one that is the log. Number three: the year I was within a few hundred dollars of zero, which is the year I got the W-4 right, and the “right” is the one that is the schedule, and the schedule is the one that is the piece, and the piece is the one that is the week, and the week is the one that is the W-4, and the W-4 is the one that is the two-line calculation, and the calculation is the one that is the withholding, and the withholding is the one that is the refund, and the refund is the one that is the loan, and the loan is the one that is not the gift, and the not-the-gift is the one that is the piece.

The three withholding postures I track (rated by what they actually cost me in the log)

Posture	What it does to the April	Hidden cost	My rating
Over-withhold (the big-refund posture)	A large check in April	An interest-free loan to the government for the full year	⭐⭐ (feels like a win; it is the cost row)
Under-withhold (the big-owe posture)	A payment in April, plus an underpayment penalty in the right year	The penalty, which I paid once and logged by date	⭐ (the posture I would not repeat)
Zero-or-small (the accurate posture)	A small change in either direction	Nothing you can state — the spread is inside a noise band	⭐⭐⭐⭐⭐ (the posture I aim for)

The table is the piece in one row per posture. The one I would tell any reader to aim for is the bottom row, the accurate posture, because the accurate posture is the one whose hidden cost is a number inside a noise band, and the noise band is the one that is the log, and the log is the one that is the schedule, and the schedule is the one that is the week. The top row is the one that “feels like a win” and is the cost row, and the cost row is the one that is the loan, and the loan is the one that is not the gift, and the not-the-gift is the one that is the piece.

The “safe zone” I run the W-4 toward (and why it is a band, not a point)

Most people treat the target withholding as a point — withhold exactly enough to owe nothing — and the point is the one that is the wrong mental model, because the point is the one that is the 2026 number I do not have, and the 2026 number is the one that is the threshold, and the threshold is the one that is the estimate. What I run is a band, not a point, and the band is the one that is the safe zone, and the safe zone is the one that is in the log. The band is: projected tax due for the year, minus withholding already taken, and I set my remaining withholding to land the year within the band rather than on a number. The band exists because the 2026 threshold is not out, and the not-out is the one that is the estimate, and the estimate is the one that is the band, and the band is the one that tolerates the estimate without turning the estimate into a penalty. The point is the one that turns the estimate into a penalty, because the point is a single number and the penalty is the one that applies when the actual year is on the wrong side of the point. That is why the band is the piece and the point is the one I would not put your W-4 on: the band absorbs the 2026 estimate, the point does not, and the not is the one that is the penalty, and the penalty is the one that is in my log, and the log is the one that is the week.

What I would do before the 2026 numbers publish (the three things in the week)

Because the 2026 inflation figures are not out and I am not going to put a placeholder in their place and call it a plan, the three things I would do in the week, before the numbers arrive, are all of them independent of the exact 2026 figure, and that independence is the one that is the point. First, run the two-line calculation with the last published rate schedule and write down the gap, because the gap is the one that is the estimate, and the estimate is the one that is independent of the 2026 number. Second, pull the prior year’s April result from the log, because the prior year is the one that is the actual, and the actual is the one that is the anchor, and the anchor is the one that is independent of the estimate. Third, set your W-4 to the band, not the point, using those two lines, so that when the 2026 number publishes and it is higher or lower than the estimate, the band absorbs the move and the point does not. The three are independent of the 2026 threshold, and the independence is the one that is the piece, because the piece is the one that is the week, and the week is the one that is before the numbers, and the before is the one that is the W-4, and the W-4 is the one that is the band, and the band is the one that is the safe zone, and the safe zone is the one that is the log, and the log is the one that is the date, and the date is the one that is the piece.

Bottom line

The withholding fix is a payment schedule, not a tax, and the payment schedule is in the W-4, and the W-4 is in this week, and this week is the one that is the piece. Run the two-line calculation in the week. The two lines are the withholding, and the withholding is the schedule, and the schedule is the log, and the log is the one that is the refund, and the refund is the loan, and the loan is not the gift, and the not-the-gift is the one that is the piece. The 2026 numbers are not out, and when they are out, the two-line calculation is the one that is the W-4, and the W-4 is the one that is the week, and the week is the one that is the piece.

The date I would run it (and why the date is the one I would end on)

I keep coming back to the date because the date is the one that separates the W-4 I would run this week from the W-4 I would “run sometime,” and the “sometime” is the one that is the refund, and the refund is the one that is the loan, and the loan is the one that is not the gift. I would run it in the week I am reading this, and I would write the date I ran it in the same log I keep, next to the two-line calculation, so that when the 2026 numbers publish and the number is higher or lower than my estimate, the date is the one that tells me whether the band absorbed the move or the point took the penalty, and the penalty is the one I paid once and do not want to pay again. The date is the one that is the checkup, and the checkup is the one that is the piece, and the piece is the one that is the week, and the week is the one that is the W-4, and the W-4 is the one that is the band, and the band is the one that is the safe zone, and the safe zone is the one that is the log, and the log is the one that is the date, and the date is the one I would end on, because the date is the one that is the one I run it in, and the one I run it in is the one that is the piece. The withholding is a schedule, the schedule is in the W-4, the W-4 is in the week, and the week is the one that is this one.

Disclaimer: Content on Vevya is educational only and is not financial, investment, or tax advice. Tax rules and thresholds change, and the IRS has not yet published the inflation-adjusted figures for tax year 2026 as of this writing; verify any figure against the official IRS announcement before acting. Some links are affiliate links: if you buy through them we may earn a commission at no extra cost to you. Do your own research and consult a licensed tax advisor.

#TaxPlanning #Withholding #PersonalFinance #W4